Automatic sharpener



oct. 20, 1931. D. SIANTHONY 1,827,965

AUTOMATIC SHARPENER v Filed July '6. 192e s sheets-sheet 1 @yf/f/@f 3 Sheets-Sheet 2 D. s. ANTHONY AUTOMATIC SHARPENER Filed July e, 1926 Oct. 20, 1931.

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AUTOMATIC SHARPENER Filed July 6, 1926 3 Sheets-Sheet 5 [yay/25W y @Wwf/X7@ f@ fr *Patented ct. 12931" 'DAVID' genieen-Y, orksAN ANToN1o,rrEXAsQI-f f y i l AUToMArIc ,Appiicauon rusa Jiuyge, 192e. seri'a`1-15m`. 129,751.

`rlhis invention relates to improvements `in., devicesv for' sharpening grinding plates .or

burrs ofgrist mills, and` particularly that' type of platev which is formed of chilledmcast Y iron and having its surface provided with machined cutting grooves or corrugatlons.; As far as I am aware no machineV has been providedforV sharpening these platesw lt is the object of my invention'to provide a small andk compact machine, which I shall term an automatic sharpenen'of simple and rigid construction, which maybeownedl and operatedby the miller, thereby avoiding the expense anddelay f sending the platesrto a Y shop to be sharpened.

. further ob. ect 1s which will operate automatically afterlthe plate has been placed in position until ithas j become completely `sharpened.

A further object is to 'provide' in apla-ner' adapted Vto sharpen' grinding plates, means for automatically alining the cutting fteethof i' the plate with the cutting tool.V

.A further objecty s to provlde'in a planer 'E improved means for actuating the movable table.

A further object is to provide in asharpen.v er improved means for regulating thed'epth ofk thecut of the tool. j

"My invention consists in the construction,'l

arrangement and'combination of thev'various parts of the device, wherebythe-objects contemplated are attained, as hereinafter more fully. set forth, pointed. out in my .claims,'iand illustratedin the accompanying drawings, in which: f'

Figure 1 is a plan view of'my'improved planer. y

VFigure 2 is a side elevation of the'fsame.

Fi0'uie3 is a detailsectional view ytia'ken'ion 2D theline 3-3 of Figure 1.l

Figure 4; is a detail sectional on the line of'Figure 3.

Figure 'is a `detail sectionalV view taken on the line 5 5 of Figure v2;

view Vtaken Figure 6'is a detail .sectional'view takenV onv the line 6-'6 of Figure 2.

. Figure 7 is-an enlarged, detail7 sideuelevar.-V

tion of the]cutterjheadandV the fmechanism to provide a sharpener,k

for lthrowing. the same into inoperative posi- A l tion."

Figure Si' is* an endelevation of the cutter l head, a portion of'which is brokenawayto`r 'show the manner in which the'cutting tool is secured therein.

My improved shapener comprises a base 10 formed hollowand having side members 11 and end. members 12 and 13. The base is mounted 'on suitable skids 14', one endy of the skids being provided with a platform 15 de-r signed'y to (':arry'anV electric motor 16 from which power for operating the pl'aneri's derived. "i y v"The forwardend v'of the ltop edge the members 11" isprovided with *horizontal A guides'17, Whilethe back end of theiupper edge 'ofsaidlmemberslll is provided with an Y upwardly/extending portion 18 designedto provide hinge members and what I shall'term l the head support 19. Said head support 19 is'provided with side members ,20, the back rends of-.which are' vpivotall'y mounted to the memberslby means of'a shaft 21. The top portion of the member 19 is provided with an opening 22 which is beveled at its upper endl and' is designed to receive a vertical shaft 23, the lower end of which is provided l*with'a'n'eye 24:., designed lto receivea shaft 25.

Thegshaft 25 `is'inounted in the side lmembersjll. r The upper end of theshaft 23 is screw threaded and designed to. carry an adjusting nuft`,26, the upper end of whichhas outwardly extending hand members 27. The shaft 23 is also provided with a collar 28 :for the purpose of'supporting the lower end of a spring 29 mountedon Ithe shaft 23, said. spring having its upper end resting against theundensurface of theliead 19. A

' The front lfa'ce'ofy themember 19 is pro'- Y videdwith forwardlyextending ears 30, be'- 'tween'whichthef cutter head 31 is pivotally mounted Vby means of ashaft 32;" Said head -is yprovided, with a vertical slot 33 which terminates at'its lower end in a dove tail groove 34 for'supportingthe cutting tool'35. The head 31 is designed to rest normally in aver- Y lyrelative tothe horizontal. The side edges ofthe tool 135I are beveled to thegrofwegV Vtical'position with the tool 35 inclined slight- 34. Aset screw 36 is mountedY in thelower end of the member 31 and provides means Y Vfor rigidly clamping the cutter 35 in position.

By this arrangement it will be seen that the lower endof the-cutter head 31, together with the cutter35, is free to swing forwardly and upwardly from' the vertical position shown in Figure 3. The rearward movement of the cutterhead is limited by means ofthe set screw 37 mounted in the lower end of the head 19, the outer end of said set screw being designed to engage the rear end of the cutter 35, and to provide means whereby any .variation in the length ofthe cutter may be compensated for, due to the` shortening ofthe same'by sharpening, so that the cutter 35 may always be made top-assume the proper `cutting angle. n l .n

Slidably mounted on the guides 17 is a table 38, which is mounted beneath the cutter 35 a slightdistance and designed to operi ate forwardly and rearwardly. YThe back edge of the under surface of the table 38 is provided with a downwardly projecting pin 39 having a roller 40 rotatively mounted thereon. Mounted transversely in the central portion of the base 10 is a trough 41 for the purpose of receiving the oil. The bottom of thetrough 41 isV provided with an gear47` mounted between the upper end of the bearingV 42 and the lower end of the hub 45. Said worm gear 47 and the cam44 are rigidly secured to said shaft by means of a key.` 48. The worm'gear. 47 is operated through a worm 49 mounted on ahorizontal 'j shaft 50, rotatively mounted in bearings 5 1 and 52 in the side members 11. The bearing 52 is provided with a1packing gland `53 for preventing oil from the containen41 from escaping through the bearing. The outer end of the shaft 50 is provided with a belt wheel 54 which is in line with a` pulley 55 of the motor 16, said belt wheels being-operatively connected by a belt 56. [u l? v By thisy arrangementit will beV seen that as the:cam.44 is rotated through the driving Amechanism just described, the tableV 38 will be moved inwardly. The camr 44 is so shaped that the inward Vmovement willbe of uniform speed while'the-said cam is making i about 7/gth of one `complete revolution, after which the table 38 is rapidly moved outwardly by means of spring 57 mounted on the out- `sideyof the base 10, the rear ends of the springs being secured to the said base by means of pins ,58.1 The forward end offeach set of springs is provided with a chain 59 deigszagee i signed to pass over a sheave 60 and has its free end secured vto the under edge of the table 38 byV means of a rivet 61. VThe chain 59 andthe pulley 60 are provided so that comparatively long springs 57 vmay be employed', which maybe arranged conveniently adjacent tothe side members 11, in the manner clearlyv illustrated in Figures 1 and 2. Thus means is provided whereby the table 38 may be movedinwardly very slowly and may be returned very rapidly, so that about 7/gthor more of the operating time is actually Vused in useful work.

Slidably mounted on top of the table 38 is what l shall term an auxiliaryitable 62, having one of its side edgesprovidedwith a 'pairlof slotted lugs A63 and its other edge with a slotted lug `64. .The slots of these lugs are provided` with zset screws which are mounted in the table 38 and provide Vmeans whereby the said auxiliary table may be adjusted relative to the top of said table and transversely with the movement of the same, for the purpose hereinafter made clear. Y

f The central portion of the auxiliary table 62 isy provided with an upwardly extending lug 66. Pivotallymounted on the lug 66 is aV disk 68 having an upwardly projecting bolt 67 and its periphery provided with ratchet teeth 69 and itsfupper surface provided with a'n annular rib`70. The under surface of said dir sk`68 and the upper edge of the rib 70 are machined smooth. The upper and lower surfaces of the auxiliary table also is machined, as well as the top surface of the table 38. f Y

The upper faceof the rib 70 is designed to support a grinding plate. 71. The under face of the plate 71 is also machined to lit the rib 70. This grinding plate is formed annular and has its inner edge slightly beveled at 72, said beveled portion'being designed to receive the beveled edge of a washer 73, said washer being mounted on the bolt 67 and secured in position by means of a nut 74. Thisfprovides means whereby the grinding plate 71 may be Arigidly secured to the disk 68, and at the same time centered exactly with the bolt 67. The upper surface of the .grinding plate 71 is providedwitha series of cutting grooves 75. These grooves are usually cutparallel with the backof the member 71 and tangentially with the center of said disk. These grooves ,are arranged'in groups, the groovesv` of each group being parallel. The cutter 35 is provided with the same number of cutting teeth thaty there are grooves in each group onthe grinder plate, so that each group of grooves may be sharpened by a single inward stroke of the cutter. It will be seen ,from` the drawings that the grinding plate will be moved toward and .from Vthe cutter 35 on account of the movement of the ,tablev 38 in a line. parallel with the teeth of said cutter., |Thev teeth, however,

the

gaat@ adjusting' the auxiliary, table transversely by Fio '" 81 and 84: to

means of the set screwsg65, so that 'the Ateeth 75 will be in linewith the teethof thefcutter 35, after which the set screws may be per: inanently set. It will further :be .seen from thev drawings thatthere is one tooth-B9 'for each group of teeth :75 soy-that'each timethe table 38 is moved inwardlythe group ofteeth opposite the cutter will'be'engaged'by said cutter and sharpened. One ofthe' teeth 6.9, will be caused tov engage a pawl 76 rigidly secured to the base A1() bymeans of 77. VThe said pawl 7 6 is adjustably secured thereto by means' of bolts,78,the pawl'being formed of yieldable.v metal' so vthat it will yieldably engage the teeth 69.V Asjthe table 38 :is moved outwardly, itwill be seen that one of the teeth 69 will pawl and the disk 68caused-to rotate, which in turn-will cause thegrindingplate71 to ybe rotated and afnew group'ofteetli 7 5 moved v toposit-ion below the ,cutter 35. A Z v Y1t will befseen, however, `that the'rotation of' the disk 68 takes place ywhile it is ybeing moved outwardly and, at the time While the l.teeth of the cutter 35 arein engagement with theteeth ofthegrindingplate, and would cause the .said` teeth to be stripped from the plate if the cutter` 35 y -cause said cutter 35 to disengage'the teeth 75, I have provided a rock shaft 79 rotatively were not elevated. a To mountedin suitable y bearings 8O of the head 19. The inner end of theY rocky shaft 79 is fprovided with arock arm 81 having a slot 82 in its free end, said arm lying adjacent to one face of the member 31; A pin 83 is mounted in the member 31 and extends through the slot 82. The` outer end ofthe shaft 79 is pro-vided with a downwardly extending rockarm 84 havingk an outwardly projecting pin 85. The table 38 is provided with a pair of trip which is adjustably connected to said table by suitable set screws 88. The bar' 86 is provided with an upwardly'gprojecting arm L 89 designed to engage the pin 35. The bar 87 is provided with an upwardly'projecting "the head in an elevated positiofnl f these partsare rigidly;constructedas'l the cut-.-y

`tingstr'ainisvery arm 90 which will engage the pin 85 just at the time the table 38 is moved to its inner limit of movement, causing the lower end of the arm 84 to be moved inwardly and the upper end of the arm 81 to be moved out-v wardly, which in turn will cause the lower end of the moved outwardly and upwardly, and caused todisengage the teeth 75. The arm 89 will be caused to engage the pin 85 at a time just' before the outward movement of the table38` This will cause the rock arms be moved in a reverse direction takes place.

gta.' l I iss' therefore, necessary` 'tlatthe bolt 67- be moved a. bracket b'e `rengaged by 'said i iliary is providedr when the dogr91 bars 86 and 87, each of means isprovided whereby cutter head 31 to be elevated and j tive position fin.v linefwlithvr anewl group of teeth tobersharpenedj; lThe rotation o f the is elevated, thereby.: eliminating? any 'l strip'- grinding diktakes 'place whilethecutter 3 1 l, i i

ping ofthe'teeth duev tothe rotarymovement about' its pivotl centerin a counterg-clockwise direction, as shown 1n Figurel, .as the cutting H.

operation takes; place. `lhi's'rotating tendency .is overcome by providinga springactuthe `cutterfis, tan-y ated dog'91 pivotally seouredjto'the auxiliary if Atable `62.

'rtwui furthefbfe Sagitta it 'is esefit'l 1 .5'

that the tooth69 be caused to engage said dog 91 rmly the teeth 75, to prevent lany ment of .said disk, V'after the diskhas moved into engagement .with said cutter. `76 is so adjusted that'the .tooth*adjacentY to the dog 91 willbemoved .af slight distance j pastvthe said dog to perm't proper setting Means is provided for slightly .a lever 92 pivoted toan outwardlyextend. ing arm v93 which tableGQ; n The inner end of the arm 92y with fa, rollerv` 94 designe/d` vto is also securedfto the yauX- engageone of the teeth 69. A' spring`95 is provided for applying yieldable pressure to saidroller. The kpartsare so adjusted that drops into position the roller before thecutter y35A-engagesY rotary ,move- The pawl 1.

ioo

k94 rests on the outer edge of one of the teeth,

' 69,*sothat rotaryv motion is imparted to said disk, causing theftooth k69 to engage the ldog 91,` thereby providing means whereby the ldisk,ytog'ether with the grindingplate, will -bermlysupported inoperative relation be-.- fore the Cutter engages the teeth of the grindg ing platef y `On account of the head ,1'9being pivotally y `connected to the base 1:0Iit` willlbefseenthat cut Aof y the severe.

LIt is sometimes morey trial cuts when thegrindingQplate "is desirableto make one or thefdepth 'ofitheavcutter 35maybe 4adjusted by fineans of the head Q6 and thesfcrewA threaded shaft 23!k The spring29 serves ltojsi/pport ll of la hand lever '96, the lowerv end o f"which' Qis pivotallyconnected to thev pawl (Said lhand lever is'provided with an inwardlypro- 'jectrigf mai97 'designed telesas a# am' shaped A sector 98y so thatv as "the topl off the handle" is swung eitherl 'forwardlyl` or l rearf werdly the ohterendfottlie paul 76 may be Y thought ahahahah dr aigdgemaitavith the out' of "engagement with saidte'eth per-1 'i'hglgdid grinding plate; l Y 4, Thus it'lwill be seen` that I haveprovided aplaner Vof simple, durable and4 inexpensive 'QHStfrutQns Whichmay be''prt breil in* 5 experienoed` operator, the onlyI `requireinent hang no; page. the1grmding-pplaifih @Shop 6h" the dishes which may' he :easily Ldhd quickly, done with the' centering plate and "the nutA 741.] iIn order Vto lproperly time' the grinding' member l" dislr upwardly projecting pin j 98,7y is: "provided which' extends into Va recess 99 fin Ythe undei1 Surface @fthe Platen, after .which 'th'e'ipwi may'V bf'estarted andthe `machine will 'work i mitf the ahh 38 i@ bei:operatedwiihhutfqail i automatically to sharpen the plates; f"

Itwill be seenthatby providing the 144i for operating'the table 38,1 have:y provided' means whereby a'slow and-powerful uniform movement may be impartedj tothe table and to the grinding plate; The-springs 57tP'OVd9S ,raplyreturnel- "l o cla'rhfasmy ilrentdm fluflnga .deviceoff he olassmdescribeia base, a" table mounted Vto slideho-rizontally "fofn saidfbasefa driving; shaftrota-tively Y. as

.todo

'said table througli'its return stroke,anaux iliary table adjustably lniimnted"*fortrans#V 'verse' movementonthe first tablefsaidiauxiliary table .being provided with an upwardly means whereby Vthe table` vmay' i support between its pivot end and its free end; lyi1dableighheaus? on :said shaft-for imi `parting-utwardmevement to said head supi" port,"anl adiusting` nut'i on the Vouter end ot threadedfshafnsaid 'cutter being mount# edi horizontally in-Isaidfheadyatable slidably mounted? onv fsa-idr? fbasejfto' f move ftoward and from said cutter, mansfor imparting a sub-f stantiall-yv uniform and 'positive movement to said table `to cause it tomove toward Vsaid cutter; vyieldableE means fforl returning Asaid table, means forrotatively'clamping stock on said table, and? :means for automatically Vimparting predeterinined rotary movement to saiclf`7stofl` "on the 'return Stroke of said table.

l'B'gIn ali-device of the'f'class described, a l Y base,l a head support having one end' pivotally-mountedto saidba'se, a cutter head piv# otally mounted 1in? the freel end of said head support, means -for*clamping a horizontal c'utterin said cutter head," means for adjusting? said"` -cutter longitudinally, fa screw threaded Vshaft'havijil'g one `enol 'pivotally mounted inffsaidbase and its opposite end slidably 'mounted r in said head Support between itsends,a.spring-carried on said shaft 'for 1 imparting l outward movement` to said head support,-"a nut? on the threaded portion oi* said shaft"for-'adjustingthe free end of lsaid headsupport, a: table slidably mounted said Vfbas'e, lmeansv for imparting positive movementto saidtabletocause itto' move toward saidcutter, yielda'blemeans for impartingireturn movement to said table, means for supporting VEand :rotating stock u on f said table', mean'slforg imparting predetermined rotary [movement to said stock" on the 'return stroke of said table, andfmeans'actuated through the movement 'oft saidtable formoving said cutter out of operative relation" with said lstock while rotary movementfis being im i e parted tothe stock. 'i i I f Des fMoinesf Iowa, June 2, 1926. Y SL ANTHONY.

' projecting pivot, arstock supporting'jdisk rotatively mounted on saidpivot and supported on the upper surface ofsaidauxliarv table, `v

said dish having its periphery provided with ratchet lteeth', and itsjcentral portion proyvidedwith'an upwardlyfpro'jecting b olt', a 4 washer slidablyV mounted on said bolt having its `periphery beveled, means for imp artinv intermittent rotary movement to saidwdis 1n one dlrectlon, a retaining pawl in contact with said ratchet teeth, and spring actuated lm eans formovingoneof said ratchet `'teeth t into firm engagement Vwith said pawl. f

` f 2; YIn av device'ofthe class described, a base, y a head support having oneend pivotally "mounted to said base,a cutter head pivotally f `i;

u ',aisc'rlew threaded shaft having ione lendpiv-v ""fotally mounted said baseand itsvscrew u' threaded ,elli Val,ihsf'ihl-y wie@ i111 Steelhead l j iet 

